I need to modify a line on my site php-fpm config, but if i make a change on cpanel it reverts my changes. How can i keep my changes after saving the file using cpanel interface? The file in question is:

I see. i get very lost when reading docs...i just wanted to enable exec, could you show me how the yaml would look like to change:
This: php_admin_value[disable_functions] = exec,passthru,shell_exec,system
to this: php_admin_value[disable_functions] = passthru,shell_exec,system